/* GLIB - Library of useful routines for C programming * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /* * Modified by the GLib Team and others 1997-2000. See the AUTHORS * file for a list of people on the GLib Team. See the ChangeLog * files for a list of changes. These files are distributed with * GLib at ftp://ftp.gtk.org/pub/gtk/. */ #ifndef __G_IOCHANNEL_H__ #define __G_IOCHANNEL_H__ #include #include G_BEGIN_DECLS /* GIOChannel */ typedef struct _GIOChannel GIOChannel; typedef struct _GIOFuncs GIOFuncs; typedef enum { G_IO_ERROR_NONE, G_IO_ERROR_AGAIN, G_IO_ERROR_INVAL, G_IO_ERROR_UNKNOWN } GIOError; typedef enum { G_SEEK_CUR, G_SEEK_SET, G_SEEK_END } GSeekType; typedef enum { G_IO_IN GLIB_SYSDEF_POLLIN, G_IO_OUT GLIB_SYSDEF_POLLOUT, G_IO_PRI GLIB_SYSDEF_POLLPRI, G_IO_ERR GLIB_SYSDEF_POLLERR, G_IO_HUP GLIB_SYSDEF_POLLHUP, G_IO_NVAL GLIB_SYSDEF_POLLNVAL } GIOCondition; struct _GIOChannel { guint channel_flags; guint ref_count; GIOFuncs *funcs; }; typedef gboolean (*GIOFunc) (GIOChannel *source, GIOCondition condition, gpointer data); struct _GIOFuncs { GIOError (*io_read) (GIOChannel *channel, gchar *buf, guint count, guint *bytes_read); GIOError (*io_write) (GIOChannel *channel, gchar *buf, guint count, guint *bytes_written); GIOError (*io_seek) (GIOChannel *channel, gint offset, GSeekType type); void (*io_close) (GIOChannel *channel); GSource * (*io_create_watch) (GIOChannel *channel, GIOCondition condition); void (*io_free) (GIOChannel *channel); }; void g_io_channel_init (GIOChannel *channel); void g_io_channel_ref (GIOChannel *channel); void g_io_channel_unref (GIOChannel *channel); GIOError g_io_channel_read (GIOChannel *channel, gchar *buf, guint count, guint *bytes_read); GIOError g_io_channel_write (GIOChannel *channel, gchar *buf, guint count, guint *bytes_written); GIOError g_io_channel_seek (GIOChannel *channel, gint offset, GSeekType type); void g_io_channel_close (GIOChannel *channel); guint g_io_add_watch_full (GIOChannel *channel, gint priority, GIOCondition condition, GIOFunc func, gpointer user_data, GDestroyNotify notify); GSource *g_io_create_watch (GIOChannel *channel, GIOCondition condition); guint g_io_add_watch (GIOChannel *channel, GIOCondition condition, GIOFunc func, gpointer user_data); /* On Unix, IO channels created with this function for any file * descriptor or socket. * * On Win32, this can be used either for files opened with the MSVCRT * (the Microsoft run-time C library) _open() or _pipe, including file * descriptors 0, 1 and 2 (corresponding to stdin, stdout and stderr), * or for Winsock SOCKETs. If the parameter is a legal file * descriptor, it is assumed to be such, otherwise it should be a * SOCKET. This relies on SOCKETs and file descriptors not * overlapping. If you want to be certain, call either * g_io_channel_win32_new_fd() or g_io_channel_win32_new_socket() * instead as appropriate. * * The term file descriptor as used in the context of Win32 refers to * the emulated Unix-like file descriptors MSVCRT provides. The native * corresponding concept is file HANDLE. There isn't as of yet a way to * get GIOChannels for Win32 file HANDLEs. */ GIOChannel* g_io_channel_unix_new (int fd); gint g_io_channel_unix_get_fd (GIOChannel *channel); #ifdef G_OS_WIN32 #define G_WIN32_MSG_HANDLE 19981206 /* Use this to get a GPollFD from a GIOChannel, so that you can call * g_io_channel_win32_poll(). After calling this you should only use * g_io_channel_read() to read from the GIOChannel, i.e. never read() * from the underlying file descriptor. For SOCKETs, it is possible to call * recv(). */ void g_io_channel_win32_make_pollfd (GIOChannel *channel, GIOCondition condition, GPollFD *fd); /* This can be used to wait a until at least one of the channels is readable. * On Unix you would do a select() on the file descriptors of the channels. */ gint g_io_channel_win32_poll (GPollFD *fds, gint n_fds, gint timeout); /* This is used to add polling for Windows messages. GDK (GTk+) programs * should *not* use this. */ void g_main_poll_win32_msg_add (gint priority, GPollFD *fd, guint hwnd); /* Create an IO channel for Windows messages for window handle hwnd. */ GIOChannel *g_io_channel_win32_new_messages (guint hwnd); /* Create an IO channel for C runtime (emulated Unix-like) file * descriptors. After calling g_io_add_watch() on a IO channel * returned by this function, you shouldn't call read() on the file * descriptor. This is because adding polling for a file descriptor is * implemented on Win32 by starting a thread that sits blocked in a * read() from the file descriptor most of the time. All reads from * the file descriptor should be done by this internal GLib * thread. Your code should call only g_io_channel_read(). */ GIOChannel* g_io_channel_win32_new_fd (int fd); /* Get the C runtime file descriptor of a channel. */ gint g_io_channel_win32_get_fd (GIOChannel *channel); /* Create an IO channel for a winsock socket. The parameter should be * a SOCKET. Contrary to IO channels for file descriptors (on *Win32), * you can use normal recv() or recvfrom() on sockets even if GLib * is polling them. */ GIOChannel *g_io_channel_win32_new_socket (gint socket); #endif G_END_DECLS #endif /* __G_IOCHANNEL_H__ */